CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to PCT Patent Application No.
PCT/CN2016/109652, entitled "Method and Device for Controlling Uplink Power", filed on December 13,
2016, which is hereby incorporated by reference in its entirety.
□TECHNICAL FIELD
[0002] Embodiments of the present application relate to the field of communications, and
more particularly, to a method and a device for controlling uplink power.
BACKGROUND
[0003] Uplink transmitting power in a Long Term Evolution (LTE) system is determined by
a terminal device according to power control parameters configured on a network side
and a downlink path loss measured by the terminal device. In the uplink transmission
of a future wireless communication system, multiple different uplink transmission
modes will be introduced, such as multiple uplink multiple access modes, or using
multiple different beams to transmit uplink signals, or using multiple precoding modes,
or using multiple transmission scheduling modes, while the methods for performing
uplink power control in the related prior art cannot meet the requirements of different
uplink transmission modes. It is therefore desirable to provide a method for controlling
uplink power that could be used in a communication system supporting multiple different
uplink transmission modes.
SUMMARY
[0004] The present application provides a method and a device for controlling uplink power,
which can flexibly adjust uplink transmitting power to meet the requirements of different
transmission modes, and are suitable for a communication system supporting multiple
transmission modes.
[0005] In a first aspect, a method for controlling uplink power is provided, including:
receiving, by a terminal device, uplink power control information transmitted by a
network device; determining, by the terminal device, according to the uplink power
control information, a target power control parameter corresponding to a target transmission
mode, where the target transmission mode is a target uplink multiple access mode,
or the target transmission mode is a target uplink beam, or the target transmission
mode is a target uplink precoding mode, or the target transmission mode is a target
transmission scheduling mode; and determining, by the terminal device, according to
the target power control parameter, target transmitting power for transmitting a target
uplink signal using the target transmission mode.
[0006] In the method for controlling uplink power according to the present application,
the terminal device determines the target power control parameter corresponding to
the target transmission mode according to the received uplink power control information
transmitted by the network device. Therefore, when the terminal device uses different
transmission modes for uplink signal transmission, an independent uplink power control
process can be used to determine the uplink transmitting power corresponding to the
transmission mode. The uplink transmitting power can be flexibly adjusted to meet
the requirements of different transmission modes, and the method is suitable for a
communication system supporting multiple transmission modes.
[0007] With reference to the first aspect, in an implementation of the first aspect, the
target transmission mode is one of multiple transmission modes.
[0008] With reference to the first aspect and the above implementation, in another implementation
of the first aspect, the target transmission mode is one of multiple candidate transmission
modes for the terminal device to transmit the target uplink signal, or the target
transmission mode is a transmission mode required for the terminal device to transmit
the target uplink signal.
[0009] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the uplink power control information includes open-loop power
control information, where the open-loop power control information includes open-loop
power control parameters corresponding to multiple transmission modes including the
target transmission mode;
where the determining, by the terminal device, according to the uplink power control
information, a target power control parameter corresponding to the target transmission
mode includes: determining, by the terminal device, according to the open-loop power
control information, a target open-loop power control parameter corresponding to the
target transmission mode from the open-loop power control parameters.
[0010] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the receiving, by the terminal device, the uplink power control
information transmitted by the network device includes: receiving, by the terminal
device, the open-loop power control information which is transmitted by the network
device through a Radio Resource Control (RRC) message.
[0011] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the target open-loop power control parameter includes at least
one of the following parameters: uplink objective receiving power, a path loss factor,
and a Sounding Reference Signal (SRS) power adjustment value.
[0012] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the uplink power control information includes power adjustment
indication information;
where the determining, by the terminal device, according to the uplink power control
information, the target power control parameter corresponding to the target transmission
mode in the multiple transmission modes includes: determining, by the terminal device,
according to the power adjustment indication information and a preset correspondence,
a target closed-loop power adjustment value corresponding to the target transmission
mode, where the preset correspondence is a correspondence between the power adjustment
indication information and a closed-loop power adjustment value.
[0013] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the determining, by the terminal device, according to the power
adjustment indication information and the preset correspondence, the target closed-loop
power adjustment value corresponding to the target transmission mode includes: determining,
by the terminal device, a target correspondence from the preset correspondence according
to the target transmission mode; and determining, by the terminal device, the target
closed-loop power adjustment value according to the power adjustment indication information
and the target correspondence.
[0014] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the receiving, by the terminal device, the uplink power control
information transmitted by the network device includes: receiving, by the terminal
device, Downlink Control Information (DCI) transmitted by the network device, where
the DCI includes the power adjustment indication information.
[0015] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the target closed-loop power adjustment value is an adjustment
value of the target transmitting power relative to first transmitting power, the first
transmitting power is transmitting power used by the terminal device for transmitting
an uplink signal of a same type as the target uplink signal for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal determined by the terminal device
according to the open-loop power control parameter corresponding to the target transmission
mode.
[0016] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the method further includes: transmitting, by the terminal device,
the target uplink signal to the network device using the target transmission mode
and the target transmitting power.
[0017] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the target uplink signal is one of the following signals: a Physical
Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), an SRS,
and a De Modulation Reference Signal (DMRS).
[0018] With reference to the first aspect and the above implementations, in another implementation
of the first aspect, the target uplink multiple access mode is one of the following
multiple access modes: Discrete Fourier Transform Spread Orthogonal Frequency Division
Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal Frequency Division Multiplexing
(CP-OFDM), Single-Carrier Frequency-Division Multiple Access (SC-FDMA), and Orthogonal
Frequency Division Multiple Access (OFDMA).
[0019] In a second aspect, a method for controlling uplink power is provided, including:
determining, by a network device, uplink power control information, where the uplink
power control information is used for the terminal device to determine a target power
control parameter corresponding to a target transmission mode and to determine, according
to the target power control parameter, target transmitting power for transmitting
a target uplink signal using the target transmission mode, where the target transmission
mode is a target uplink multiple access mode, or the target transmission mode is a
target uplink beam, or the target transmission mode is a target uplink precoding mode,
or the target transmission mode is a target transmission scheduling mode; and transmitting,
by the network device, the uplink power control information to the terminal device.
[0020] According to the method for controlling uplink power of the present application,
the network device transmits the uplink power control information to the terminal
device, so that the terminal device can determine the target power control parameter
corresponding to the target transmission mode according to the received uplink power
control information. Therefore, when the terminal device uses different transmission
modes for uplink signal transmission, an independent uplink power control process
can be used to determine the uplink transmitting power corresponding to the transmission
mode. The uplink transmitting power can be flexibly adjusted to meet the requirements
of different transmission modes, and the method is suitable for a communication system
supporting multiple transmission modes.
[0021] With reference to the second aspect, in an implementation of the second aspect, the
target transmission mode is one of multiple transmission modes.
[0022] With reference to the second aspect and the above implementation, in another implementation
of the second aspect, the target transmission mode is one of multiple candidate transmission
modes for the terminal device to transmit the target uplink signal, or the target
transmission mode is a transmission mode required for the terminal device to transmit
the target uplink signal.
[0023] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the uplink power control information includes open-loop power
control information, where the open-loop power control information includes open-loop
power control parameters corresponding to multiple transmission modes including the
target transmission mode, and the open-loop power control information is used for
the terminal device to determine a target open-loop power control parameter corresponding
to the target transmission mode from the open-loop power control parameters.
[0024] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the transmitting, by the network device, the uplink power control
information to the terminal device includes: transmitting, by the network device,
the open-loop power control information to the terminal device through a Radio Resource
Control (RRC) message.
[0025] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the target open-loop power control parameter includes at least
one of the following parameters: uplink objective receiving power, a path loss factor,
and a Sounding Reference Signal (SRS) adjustment value.
[0026] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the uplink power control information includes power adjustment
indication information, where the power adjustment indication information is used
for the terminal device to determine, according to the power control indication information
and a preset correspondence, a target closed-loop power adjustment value corresponding
to the target transmission mode, where the preset correspondence is a correspondence
between the power adjustment indication information and a closed-loop power adjustment
value.
[0027] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the transmitting, by the network device, the uplink power control
information to the terminal device includes: transmitting, by the network device,
Downlink Control Information (DCI) to the terminal device, where the DCI includes
the power adjustment indication information.
[0028] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the target closed-loop power adjustment value is an adjustment
value of the target transmitting power relative to first transmitting power, the first
transmitting power is transmitting power used by the terminal device for transmitting
an uplink signal of a same type as the target uplink signal for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal determined by the terminal device
according to the open-loop power control parameter corresponding to the target transmission
mode.
[0029] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the method further includes: receiving, by the network device,
the target uplink signal transmitted by the terminal device using the target transmission
mode and the target transmitting power.
[0030] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the target uplink signal is one of the following signals: a
Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH),
an SRS, and a De Modulation Reference Signal (DMRS).
[0031] With reference to the second aspect and the above implementations, in another implementation
of the second aspect, the target uplink multiple access mode is one of the following
multiple access modes: Discrete Fourier Transform Spread Orthogonal Frequency Division
Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal Frequency Division Multiplexing
(CP-OFDM), Single-Carrier Frequency-Division Multiple Access (SC-FDMA), and Orthogonal
Frequency Division Multiple Access (OFDMA).
[0032] In a third aspect, a terminal device is provided for performing the method of the
first aspect or any of the possible implementations of the first aspect described
above. In particular, the terminal device includes functional modules for performing
the method of the first aspect or any of the possible implementations of the first
aspect described above.
[0033] In a fourth aspect, a network device is provided for performing the method of the
second aspect or any of the possible implementations of the second aspect described
above. In particular, the network device includes functional modules for performing
the method of the second aspect or any of the possible implementations of the second
aspect described above.
[0034] In a fifth aspect, a terminal device including a processor, a memory and a transceiver
is provided. The processor, the memory and the transceiver communicate with each other
through an internal connection path, transmitting control and/or data signals, such
that the terminal device performs the method of the first aspect or any of the possible
implementations of the first aspect described above.
[0035] In a sixth aspect, a network device including a processor, a memory and a transceiver
is provided. The processor, the memory and the transceiver communicate with each other
through an internal connection path, transmitting control and/or data signals, such
that the network device performs the method of the second aspect or any of the possible
implementations of the second aspect described above.
[0036] In a seventh aspect, a computer readable medium is provided for storing a computer
program, the computer program including instructions for performing the first aspect
or any of the possible implementations of the first aspect described above.
[0037] In an eighth aspect, a computer readable medium is provided for storing a computer
program, the computer program including instructions for performing the second aspect
or any of the possible implementations of the second aspect described above.
□BRIEF DESCRIPTION OF DRAWINGS
[0038]
FIG. 1 is a schematic flowchart of a method for controlling uplink power according
to an embodiment of the present application;
FIG. 2 is another schematic flowchart of a method for controlling uplink power according
to an embodiment of the present application;
FIG. 3 is a schematic flowchart of a method for controlling uplink power according
to another embodiment of the present application;
FIG. 4 is another schematic flowchart of a method for controlling uplink power according
to another embodiment of the present application;
FIG. 5 is a schematic block diagram of a terminal device according to an embodiment
of the present application;
FIG. 6 is a schematic block diagram of a network device according to an embodiment
of the present application;
FIG. 7 is a schematic block diagram of a terminal device according to another embodiment
of the present application; and
FIG. 8 is a schematic block diagram of a network device according to another embodiment
of the present application.
□DESCRIPTION OF EMBODIMENTS
[0039] Technical solutions in embodiments of the present application will be clearly and
comprehensively described in the following with reference to the accompanying drawings.
[0040] It should be understood that the technical solutions of the embodiments of the present
application can be applied to various communication systems, for example, Global System
of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system,
Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service
(GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system,
LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS) or
Worldwide Interoperability for Microwave Access (WiMAX) communication system, and
5G system or New Radio (NR) system.
[0041] In embodiments of the present application, a terminal device can include, but is
not limited to, a mobile station (MS), a mobile terminal, a mobile telephone, user
equipment (UE), a handset, portable equipment, and a vehicle, etc. The terminal device
can communicate with one or more core networks via a Radio Access Network (RAN). For
example, the terminal device can be a mobile telephone (or a cellular telephone),
and a computer having wireless communication functions, etc. The terminal device can
also be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile
apparatuses.
[0042] In embodiments of the present application, a network device is an apparatus deployed
in a radio access network to provide wireless communication functions for terminal
devices. The network device can be a base station, and the base station can include
various forms of macro base stations, micro base stations, relay stations, access
points, and the like. In systems with different radio access technologies, the names
of devices having base station functions may vary. For example, it is called an Evolved
NodeB (eNB or eNodeB) in an LTE network, while it is called a Node B in a 3rd Generation
(3G) network.
[0043] Uplink transmission in an LTE system only supports a Discrete Fourier Transform Spread
Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) multiple access mode, and
only one set of uplink power control parameters needs to be configured on the network
side for the uplink transmission, but currently two uplink multiple access modes (or
referred to as uplink waveforms) are introduced in uplink transmission in a 5G system:
a DFT-S-OFDM multiple access mode and a Cyclic Prefix (CP) - OFDM multiple access
mode. The former can only be used for uplink single layer transmission, and the latter
can be used for uplink single layer or multilayer transmission. Which multiple access
mode a terminal device uses can be configured by the network side according to uplink
channel quality of a terminal. Generally, the DFT-S-OFDM multiple access mode has
better channel transmission coverage performance, but lower spectrum efficiency. The
CP-OFDM multiple access mode has higher spectral efficiency, but poorer coverage performance
due to a higher Peak to Average Power Ratio (PAPR). When a terminal device uses different
multiple access modes for uplink signal transmission, the required uplink transmitting
power is different due to different coverage.
[0044] Moreover, when a terminal device uses different uplink beams to transmit uplink signals,
the receiving power of a network device is different. Therefore, in order to avoid
interference of the terminal device with other terminal devices, different transmitting
power needs to be used for different uplink beams. Further, the efficiency of transmitting
power needs to be improved in future communication systems, and therefore it is required
to use different transmitting power for different precoding modes. Further, two transmission
scheduling modes would be introduced in the future communication systems: uplink signal
transmission scheduled by the network and spontaneous uplink signal transmission from
a terminal device. The former is scheduled by uplink grant (UL Grant), and the latter
does not require UL Grant for scheduling, where the terminal device spontaneously
transmits the uplink signal when needed. In order to avoid interference from the spontaneous
transmission of the terminal device with other devices, different transmitting power
needs to be used for different transmission scheduling modes.
[0045] However, existing methods for controlling uplink power in LTE cannot meet the requirements
of different transmission modes. Therefore, embodiments of the present application
provide a method for controlling uplink power, enabling a terminal device to calculate
uplink transmitting power corresponding to each transmission mode by using an independent
uplink power control process, and enabling flexible adjustment of uplink transmitting
power to meet the requirements of different transmission modes.
[0046] It should be noted that, in embodiments of the present application, uplink transmission
refers to a process in which a terminal device transmits a signal to a network device,
and downlink transmission refers to a process in which a network device transmits
a signal to a terminal device.
[0047] FIG. 1 illustrates a method for controlling uplink power according to an embodiment
of the present application. As shown in FIG. 1, a method 100 includes:
S110: a terminal device receives uplink power control information transmitted by a
network device;
S120: the terminal device determines a target power control parameter corresponding
to a target transmission mode according to the uplink power control information, where
the target transmission mode is a target uplink multiple access mode, or the target
transmission mode is a target uplink beam, or the target transmission mode is a target
uplink precoding mode, or the target transmission mode is a target transmission scheduling
mode; and
S130: the terminal device determines, according to the target power control parameter,
target transmitting power for transmitting a target uplink signal using the target
transmission mode.
[0048] According to the method for controlling uplink power provided by embodiments of the
present application, the terminal device determines the target power control parameter
corresponding to the target transmission mode according to the received uplink power
control information transmitted by the network device. Therefore, when the terminal
device uses different transmission modes for uplink signal transmission, an independent
uplink power control process can be used to determine the uplink transmitting power
corresponding to the transmission mode. The uplink transmitting power can be flexibly
adjusted to meet the requirements of different transmission modes, and the method
is suitable for a communication system supporting multiple transmission modes.
[0049] Specifically, when the terminal device transmits uplink signals using different uplink
multiple access modes, an independent uplink power control process can be used to
determine uplink transmitting power corresponding to different uplink multiple access
modes. The uplink transmitting power can be flexibly adjusted to meet the requirements
of different uplink access modes, and the method is suitable for a communication system
supporting multiple transmission modes.
[0050] Or, when the terminal device transmits uplink signals using different uplink beams,
an independent uplink power control process can be used to determine uplink transmitting
power corresponding to different uplink beams, which meets the requirements of different
uplink beams, and can control the interference of the terminal device with other terminal
devices. In embodiments of the present application, the terminal device transmitting
the target uplink signal using the target uplink beam refers to that the terminal
device performs beamforming on the target uplink signal using a beamforming vector
corresponding to a target uplink beam mode.
[0051] Or, when the terminal device transmits uplink signals using different precoding modes,
an independent uplink power control process can be used to determine uplink transmitting
power corresponding to different precoding modes, which meets the requirements of
different precoding modes, enables different precoding modes with different transmitting
power, and improves the efficiency of transmitting power under the premise of ensuring
performance. In embodiments of the present application, a precoding mode includes
single port transmission, transmit diversity, spatial multiplexing, open-loop precoding,
quasi-open-loop precoding, closed-loop precoding, and the like.
[0052] Or, when the terminal device transmits uplink signals using different transmission
scheduling modes, an independent uplink power control process can be used to determine
uplink transmitting power corresponding to different transmission scheduling modes,
which meets the requirements of different transmission scheduling modes, and can avoid
the interference from spontaneous uplink transmission of the terminal device with
other terminal devices.
[0053] It should be noted that, after the terminal device determines, according to the target
power control parameter, the target transmitting power for transmitting the target
uplink signal using the target transmission mode, it is possible to use the target
transmission mode and the target transmitting power to transmit the target uplink
signal at the current time, or it is also possible not to use the target transmission
mode to transmit the target uplink signal at the current time. When the terminal device
does not use the target transmission mode to transmit the target uplink signal at
the current time, the terminal device may store the determined target transmitting
power, and when the target transmission mode is used to actually transmit a target
uplink signal, the determined target transmitting power is used to transmit the target
uplink signal.
[0054] Moreover, the target transmission mode can be one of multiple candidate transmission
modes that may be used by the terminal device to transmit the target uplink signal.
In this case, the terminal device determines a power control parameter corresponding
to each candidate transmission mode according to the uplink power control information
transmitted by the network device. Or, the target transmission mode is a transmission
mode required for the terminal device to transmit the target uplink signal. In this
case, the terminal device can determine the target transmission mode according to
transmission indication information configured by the network side. For example, the
target transmission mode may be explicitly indicated by a signaling, for example,
a Radio Resource Control (RRC) message or Downlink Control Information (DCI). Or the
target transmission mode may be implicitly indicated by other information, for example,
different DCI formats correspond to different transmission modes.
[0055] In embodiments of the present application, optionally, the target transmission mode
is one of multiple transmission modes. For example, when the target transmission mode
is a target uplink multiple access mode, the target uplink multiple access mode is
one of multiple uplink multiple access modes. For example, the target uplink multiple
access mode is one of the following multiple access modes: Fourier Transform Spread
Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) Cyclic Prefix (CP) - OFDM,
Single-Carrier Frequency-Division Multiple Access (SC-FDMA), and Orthogonal Frequency
Division Multiple Access Orthogonal Frequency Division Multiple Access (OFDMA). Or,
when the target transmission mode is a target uplink beam, the target uplink beam
is one of multiple uplink beams. Or, when the target transmission mode is a target
uplink precoding mode, the target uplink precoding mode is one of multiple precoding
modes. Or, when the target transmission mode is a target transmission scheduling mode,
the target transmission scheduling mode is one of multiple transmission scheduling
modes.
[0056] In embodiments of the present application, optionally, the uplink power control information
includes open-loop power control information, and the open-loop power control information
includes open-loop power control parameters corresponding to multiple transmission
modes including the target transmission mode. The terminal device determines, according
to the open-loop power control information, a target open-loop power control parameter
corresponding to the target transmission mode from the open-loop power parameters.
[0057] Specifically, the open-loop power control information includes open-loop power control
parameters corresponding to multiple uplink multiple access modes, and/or the open-loop
power control information includes open-loop power control parameters corresponding
to multiple uplink beams, and/or the open-loop power control information includes
open-loop power control parameters corresponding to multiple target uplink precoding
modes, and/or the open-loop power control information includes open-loop power control
parameters corresponding to multiple transmission scheduling modes.
[0058] Optionally, as an example, the target open-loop power control parameter includes
at least one of the following parameters: uplink objective receiving power, a path
loss factor, and a Sounding Reference Signal (SRS) power adjustment value.
[0059] Optionally, as an example, the terminal device receives the open-loop power control
information which is transmitted by the network device through an RRC message. The
network device separately configures respective open-loop power control parameter
for different transmission modes (for example, different uplink multiple access modes)
through the open-loop power control information.
[0060] Specifically, in some embodiments, the network device can configure a complete open-loop
power control parameter for one transmission mode, and configure offset values relative
to the open-loop power control parameter corresponding to the one transmission mode
for other transmission modes, thereby saving the overhead of downlink signaling. Taking
the transmission mode being an uplink multiple access mode as an example, the network
device configures target uplink receiving power corresponding to the DFT-S-OFDM to
be -60 dBm, and configures an offset value for target uplink receiving power corresponding
to the CP-OFDM relative to the target uplink receiving power corresponding to the
DFT-S-OFDM to be 10 dBm.
[0061] Or, in some embodiments, the network device configures a complete open-loop power
control parameter for each transmission mode. Taking the transmission mode being an
uplink multiple access mode as an example, the network device configures target uplink
receiving power corresponding to the DFT-S-OFDM to be -60 dBm with a path loss factor
being 1, and configures target uplink receiving power corresponding to the CP-OFDM
to be 20 dBm with a path loss factor being 2. When the terminal device determines
to transmit the target uplink signal using one of the uplink multiple access modes,
the transmitting power of the target uplink signal is calculated according to the
open-loop power control parameter corresponding to the determined uplink multiple
access mode.
[0062] In embodiments of the present application, optionally, the uplink power control information
includes power adjustment indication information, and the terminal device determines
a target closed-loop power adjustment value corresponding to the target transmission
mode according to the power adjustment indication information and a preset correspondence,
where the preset correspondence is a correspondence between the power adjustment indication
information and the closed-loop power adjustment value.
[0063] Optionally, in some embodiments, the terminal device receives DCI transmitted by
the network device, where the DCI includes the power adjustment indication information.
Moreover, the DCI here may be DCI for scheduling target uplink signal transmission,
or may be DCI dedicated to carrying the power adjustment indication information, where
the DCI is not used for scheduling transmission of the target uplink signal.
[0064] Optionally, as an example, the foregoing preset correspondence may be pre-determined
by the terminal device and the network device, or may be configured for the terminal
device by the network device through indication information. The preset correspondence
can be shown in Table 1. It should be noted that Table 1 merely gives an example of
the preset correspondence, rather than setting a limitation on the preset correspondence.
Table 1
Value of an indication field of power adjustment indication information in DCI |
Closed-loop power adjustment value (in dB) |
00 |
-1 |
01 |
0 |
10 |
1 |
11 |
3 |
[0065] In embodiments of the present application, for different transmission modes, a closed-loop
power adjustment value indicated by the same indication field in the power adjustment
indication information may be different. Therefore, the terminal device needs to determine
a target correspondence from the preset correspondence according to the target transmission
mode, and then determine the target closed-loop power adjustment value according to
the power adjustment information and the target correspondence. For example, for different
uplink multiple access modes, a correspondence between the power adjustment indication
information and the closed-loop power adjustment value may be pre-determined by the
terminal device and the network device, or may be configured for the terminal device
by the network device through indication information. For example, Table 2 shows another
correspondence between the power adjustment indication information and the closed-loop
power adjustment value.
Table 2
Value of an indication field of power adjustment indication information in DCI |
Closed-loop power adjustment value for DFT-S-OFDM (in dB) |
Closed-loop power adjustment value for CP-OFDM (in dB) |
00 |
-1 |
-0.5 |
01 |
0 |
0 |
10 |
1 |
0.5 |
11 |
3 |
1.5 |
[0066] In embodiments of the present application, optionally, the target closed-loop power
adjustment value may be an absolute value adjusted based on open-loop power, or may
be an accumulated value adjusted based on previous transmitting power. The network
device may configure, by signaling, the target closed-loop power adjustment value
for the terminal device, to be either an absolute value adjusted based on the open-loop
power or an accumulated value adjusted based on the previous transmitting power.
[0067] Specifically, in some embodiments, the target closed-loop power adjustment value
is an adjustment value of the target transmitting power relative to first transmitting
power, the first transmitting power is transmitting power used by the terminal device
transmitting an uplink signal of the same type as the target uplink signal for the
previous time. For example, the target closed-loop power adjustment value may be an
adjustment value of transmitting power for a Physical Uplink Shared Channel (PUSCH)
to be transmitted by the terminal device relative to transmitting power for the PUSCH
transmitted by the terminal device for the previous time.
[0068] Or, the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of the same type as the target uplink signal using the target transmission
mode for the previous time. For example, the target closed-loop power adjustment value
is an adjustment value of transmitting power for the PUSCH to be transmitted by the
terminal device using DFT-S-OFDM relative to transmitting power for the PUSCH transmitted
by the terminal device using the DFT-S-OFDM for the previous time.
[0069] Or, the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of the same type as the target uplink signal. For example, the target closed-loop
power adjustment value is an adjustment value of transmitting power for the PUSCH
to be transmitted by the terminal device relative to most recently calculated transmitting
power for the PUSCH. This does not mean that the terminal device needs to actually
transmit the PUSCH when updating the transmitting power, but the terminal device will
store the most recently calculated transmitting power for the PUSCH for subsequent
PUSCH transmission.
[0070] Or, the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
the same type as the target uplink signal. For example, the target power adjustment
value is an adjustment value of transmitting power for the PUSCH to be transmitted
by the terminal device using DFT-S-OFDM relative to the most recently calculated (or
most recently updated) transmitting power for the PUSCH transmitted using DFT-S-OFDM.
This does not mean that the terminal device needs to actually transmit the PUSCH when
updating the transmitting power, but the terminal device will store the most recently
calculated transmitting power for the PUSCH for subsequent PUSCH transmission.
[0071] Or, the target power adjustment value is an adjustment value of the target transmitting
power relative to fifth transmitting power, the fifth transmitting power is transmitting
power of the target uplink signal which is determined by the terminal device according
to an open-loop power control parameter corresponding to the target transmission mode.
The open-loop power control parameter here may be a parameter configured by the network
device through upper layer signaling, such as objective receiving power and a path
loss factor. The terminal device can calculate the transmitting power according to
formula (1) and the open-loop power control parameter.
Here,
MPUSCH(
i) is uplink transmission bandwidth, P
0_PUSH(
j) is the objective receiving power,
α(
j) is the path loss factor, PL is a downlink path loss, Δ
TF(
i) is an adjustment value related to Modulation and Coding Scheme (MCS).
[0072] In the foregoing embodiments, the terminal device can determine the target open-loop
power control parameter corresponding to the target transmission mode according to
the open-loop power control parameters respectively configured by the network device
for different transmission modes through higher layer signaling, and determine the
target closed-loop power adjustment value corresponding to the target transmission
mode according to the power adjustment indication information carried by the network
device through DCI. The terminal device then calculates the target transmitting power
according to the target open-loop power control parameter, the target closed-loop
power adjustment value, and a preset transmitting power calculation method or formula.
[0073] Further, after the terminal device determines the target transmitting power, as shown
in FIG. 2, the method 100 further includes:
S130: the terminal device transmits the target uplink signal to the network device
using the target transmission mode and the target transmitting power.
[0074] In all the foregoing embodiments, optionally, the target uplink signal is one of
the following signals: a PUSCH, a Physical Uplink Control Channel (PUCCH), an SRS,
and a De Modulation Reference Signal (DMRS).
[0075] The method for controlling uplink power according to embodiments of the present application
is described in detail above from the view of a terminal device side with reference
to FIG. 1 and FIG. 2, and the method for controlling uplink power according to embodiments
of the present application will be described in detail below from the view of a network
device side with reference to FIG. 3 and FIG. 4. It should be understood that the
interaction between the network device and the terminal device described on the network
device side is the same as that described on the terminal device side. To avoid repetition,
related description is omitted as appropriate.
[0076] FIG. 3 shows a method for controlling uplink power according to another embodiment
of the present application. As shown in FIG. 3, a method 200 includes:
S210: a network device determines uplink power control information, where the uplink
power control information is used for the terminal device to determine a target power
control parameter corresponding to a target transmission mode, and to determine, according
to the target power control parameter, target transmitting power for transmitting
a target uplink signal using the target transmission mode, where the target transmission
mode is a target uplink multiple access mode, or the target transmission mode is a
target uplink beam, or the target transmission mode is a target uplink precoding mode,
or the target transmission mode is a target transmission scheduling mode;
S220: the network device transmits the uplink power control information to the terminal
device.
[0077] Therefore, according to the method for controlling uplink power in embodiments of
the present application, the network device transmits the uplink power control information
to the terminal device, so that the terminal device can determine the target power
control parameter corresponding to the target transmission mode according to the received
uplink power control information. Therefore, when the terminal device uses different
transmission modes for uplink signal transmission, an independent uplink power control
process can be used to determine the uplink transmitting power corresponding to the
transmission mode. The uplink transmitting power can be flexibly adjusted to meet
the requirements of different transmission modes, and the method is suitable for a
communication system supporting multiple transmission modes.
[0078] In embodiments of the present application, optionally, the target transmission mode
is one of multiple transmission modes.
[0079] In embodiments of the present application, optionally, the target transmission mode
is one of multiple candidate transmission modes for the terminal device to transmit
the target uplink signal; or the target transmission mode is a transmission mode required
for the terminal device to transmit the target uplink signal.
[0080] In embodiments of the present application, optionally, the uplink power control information
includes open-loop power control information, where the open-loop power control information
includes open-loop power control parameters corresponding to multiple transmission
modes including the target transmission mode, and the open-loop power control information
is used for the terminal device to determine a target open-loop power control parameter
corresponding to the target transmission mode from the open-loop power control parameters.
[0081] In embodiments of the present application, optionally, S220 specifically includes
that the network device transmits the open-loop power control information to the terminal
device through a Radio Resource Control (RRC) message.
[0082] In embodiments of the present application, optionally, the target open-loop power
control parameter includes at least one of the following parameters: uplink objective
receiving power, a path loss factor, and a Sounding Reference Signal (SRS) adjustment
value.
[0083] In embodiments of the present application, optionally, the uplink power control information
includes power adjustment indication information, where the power adjustment indication
information is used for the terminal device to determine, according to the power control
indication information and a preset correspondence, a target closed-loop power adjustment
value corresponding to the target transmission mode, where the preset correspondence
is a correspondence between the power adjustment indication information and a closed-loop
power adjustment value.
[0084] In embodiments of the present application, optionally, S120 specifically includes
that the network device transmits Downlink Control Information (DCI) to the terminal
device, where the DCI includes the power adjustment indication information.
[0085] In embodiments of the present application, optionally, the target closed-loop power
adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, where the first transmitting power is transmitting power
used by the terminal device for transmitting an uplink signal of the same type as
the target uplink signal for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, where the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of the same type as the target uplink signal using the target transmission
mode for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, where the third transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, where the fourth transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal which is transmitted using the target transmission mode and is
of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, where the fifth transmitting
power is transmitting power of the target uplink signal determined by the terminal
device according to the open-loop power control parameter corresponding to the target
transmission mode.
[0086] In embodiments of the present application, optionally, as shown in FIG. 4, the method
200 further includes:
S230: the network device receives the target uplink signal transmitted by the terminal
device using the target transmission mode and the target transmitting power.
[0087] In embodiments of the present application, optionally, the target uplink signal is
one of the following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
[0088] In embodiments of the present application, optionally, the target uplink multiple
access mode is one of the following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
[0089] The method for controlling uplink power according to embodiments of the present application
is described in detail above with reference to FIG. 1 to FIG. 4. The terminal device
according to embodiments of the present application will be described in detail below
with reference to FIG. 5. As shown in FIG. 5 , a terminal device 10 includes:
a transceiver module 11 configured to receive uplink power control information transmitted
by a network device;
a processing module 12 configured to determine, according to the uplink power control
information, a target power control parameter corresponding to a target transmission
mode, where the target transmission mode is a target uplink multiple access mode,
or the target transmission mode is a target uplink beam, or the target transmission
mode is a target uplink coding mode, or the target transmission mode is a target transmission
scheduling mode;
the processing module 12 is further configured to determine, according to the target
power control parameter, target transmitting power for transmitting a target uplink
signal using the target transmission mode.
[0090] Therefore, the terminal device according to embodiments of the present application
determines the target power control parameter corresponding to the target transmission
mode according to the received uplink power control information transmitted by the
network device. Therefore, when the terminal device uses different transmission modes
for uplink signal transmission, an independent uplink power control process can be
used to determine the uplink transmitting power corresponding to the transmission
mode. The uplink transmitting power can be flexibly adjusted to meet the requirements
of different transmission modes, and the terminal device is suitable for a communication
system supporting multiple transmission modes.
[0091] In embodiments of the present application, optionally, the target transmission mode
is one of multiple transmission modes.
[0092] In embodiments of the present application, optionally, the target transmission mode
is one of multiple candidate transmission modes for the terminal device to transmit
the target uplink signal; or the target transmission mode is a transmission mode required
for the terminal device to transmit the target uplink signal.
[0093] In embodiments of the present application, optionally, the uplink power control information
includes open-loop power control information, where the open-loop power control information
includes open-loop power control parameters corresponding to multiple transmission
modes including the target transmission mode;
where the processing module 12 is specifically configured to: determine, according
to the open-loop power control information, a target open-loop power control parameter
corresponding to the target transmission mode from the open-loop power control parameters.
[0094] In embodiments of the present application, optionally, the transceiver module 11
is specifically configured to: receive the open-loop power control information that
is transmitted by the network device through a Radio Resource Control (RRC) message.
[0095] In embodiments of the present application, optionally, the target open-loop power
control parameter includes at least one of the following parameters: uplink objective
receiving power, a path loss factor, and a Sounding Reference Signal (SRS) power adjustment
value.
[0096] In embodiments of the present application, optionally, the uplink power control information
includes power adjustment indication information;
where the processing module 12 is specifically configured to: determine, according
to the power adjustment indication information and a preset correspondence, a target
closed-loop power adjustment value corresponding to the target transmission mode,
where the preset correspondence is a correspondence between the power adjustment indication
information and a closed-loop power adjustment value.
[0097] In embodiments of the present application, optionally, the processing module 12 is
specifically configured to: determine a target correspondence from the preset correspondence
according to the target transmission mode; and determine the target closed-loop power
adjustment value according to the power adjustment indication information and the
target correspondence.
[0098] In embodiments of the present application, optionally, the transceiver module 11
is specifically configured to: receive Downlink Control Information (DCI) transmitted
by the network device, where the DCI includes the power adjustment indication information.
[0099] In embodiments of the present application, optionally, the target closed-loop power
adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, where the first transmitting power is transmitting power
used by the terminal device for transmitting an uplink signal of the same type as
the target uplink signal for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, where the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of the same type as the target uplink signal using the target transmission
mode for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, where the third transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, where the fourth transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal which is transmitted using the target transmission mode and is
of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, where the fifth transmitting
power is transmitting power of the target uplink signal determined by the terminal
device according to the open-loop power control parameter corresponding to the target
transmission mode.
[0100] In embodiments of the present application, optionally, the transceiver module 11
is further configured to: transmit the target uplink signal to the network device
using the target transmission mode and the target transmitting power.
[0101] In embodiments of the present application, optionally, the target uplink signal is
one of the following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
[0102] In embodiments of the present application, optionally, the target uplink multiple
access mode is one of the following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
[0103] The terminal device according to embodiments of the present application may refer
to the process corresponding to the method 100 in embodiments of the present application,
and the respective units/modules in the terminal device and other operations and/or
functions described above are respectively to implement the corresponding processes
in the method 100. For the sake of brevity, they will not be repeated here.
[0104] FIG. 6 shows a network device according to an embodiment of the present application.
As shown in FIG. 6, a network device 20 includes:
a processing module 21 configured to determine uplink power control information, where
the uplink power control information is used for the terminal device to determine
a target power control parameter corresponding to a target transmission mode and to
determine, according to the target power control parameter, target transmitting power
for transmitting a target uplink signal using the target transmission mode, where
the target transmission mode is a target uplink multiple access mode, or the target
transmission mode is a target uplink beam, or the target transmission mode is a target
uplink precoding mode, or the target transmission mode is a target transmission scheduling
mode; and
a transceiver module 22 configured to transmit the uplink power control information
to the terminal device.
[0105] Therefore, the network device according to embodiments of the present application
transmits the uplink power control information to the terminal device, so that the
terminal device can determine the target power control parameter corresponding to
the target transmission mode according to the received uplink power control information.
Therefore, when the terminal device uses different transmission modes for uplink signal
transmission, an independent uplink power control process can be used to determine
the uplink transmitting power corresponding to the transmission mode. The uplink transmitting
power can be flexibly adjusted to meet the requirements of different transmission
modes, and the network device is suitable for a communication system supporting multiple
transmission modes.
[0106] In embodiments of the present application, optionally, the target transmission mode
is one of multiple transmission modes.
[0107] In embodiments of the present application, optionally, the target transmission mode
is one of multiple candidate transmission modes for the terminal device to transmit
the target uplink signal, or the target transmission mode is a transmission mode required
for the terminal device to transmit the target uplink signal.
[0108] In embodiments of the present application, optionally, the uplink power control information
includes open-loop power control information, where the open-loop power control information
includes open-loop power control parameters corresponding to multiple transmission
modes including the target transmission mode, and the open-loop power control information
is used for the terminal device to determine a target open-loop power control parameter
corresponding to the target transmission mode from the open-loop power control parameters.
[0109] In embodiments of the present application, optionally, the transceiver module 22
is specifically configured to: transmit the open-loop power control information to
the terminal device through a Radio Resource Control (RRC) message.
[0110] In embodiments of the present application, optionally, the target open-loop power
control parameter includes at least one of the following parameters: uplink objective
receiving power, a path loss factor, and a Sounding Reference Signal (SRS) adjustment
value.
[0111] In embodiments of the present application, optionally, the uplink power control information
includes power adjustment indication information, where the power adjustment indication
information is used for the terminal device to determine a target closed-loop power
adjustment value corresponding to the target transmission mode according to the power
control indication information and a preset correspondence, where the preset correspondence
is a correspondence between the power adjustment indication information and a closed-loop
power adjustment value.
[0112] In embodiments of the present application, optionally, the transceiver 22 module
is specifically configured to: transmit Downlink Control Information (DCI) to the
terminal device, where the DCI includes the power adjustment indication information.
[0113] In embodiments of the present application, optionally, the target closed-loop power
adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, where the first transmitting power is transmitting power
used by the terminal device for transmitting an uplink signal of the same type as
the target uplink signal for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, where the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of the same type as the target uplink signal using the target transmission
mode for the previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, where the third transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, where the fourth transmitting
power is transmitting power, which is most recently determined by the terminal device,
of an uplink signal which is transmitted using the target transmission mode and is
of the same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, where the fifth transmitting
power is transmitting power of the target uplink signal determined by the terminal
device according to the open-loop power control parameter corresponding to the target
transmission mode.
[0114] In embodiments of the present application, optionally, the transceiver module 22
is further configured to: receive the target uplink signal transmitted by the terminal
device using the target transmission mode and the target transmitting power.
[0115] In embodiments of the present application, optionally, the target uplink signal is
one of the following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
[0116] In embodiments of the present application, optionally, the target uplink multiple
access mode is one of the following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
[0117] The network device according to embodiments of the present application may refer
to the process corresponding to the method 200 in embodiments of the present application,
and the respective units/modules in the network device and the foregoing other operations
and/or functions are to respectively implement the corresponding processes in the
method 200. For the sake of brevity, they will not be repeated here.
[0118] FIG. 7 shows a terminal device according to another embodiment of the present application.
As shown in FIG. 7, a terminal device 100 includes a processor 110 and a transceiver
120. The processor 110 is connected to the transceiver 120. Optionally, the network
device 100 further includes a memory 130, and the memory 130 is connected to the processor
110. The processor 110, the memory 130, and the transceiver 120 can communicate with
each other through an internal connection path. The transceiver 120 is configured
to receive uplink power control information transmitted by a network device, and the
processor 110 is configured to: determine, according to the uplink power control information,
a target power control parameter corresponding to a target transmission mode, where
the target transmission mode is a target uplink multiple access mode, or the target
transmission mode is a target uplink beam, or the target transmission mode is a target
uplink precoding mode, or the target transmission mode is a target transmission scheduling
mode; and determine, according to the target power control parameter, target transmitting
power for transmitting a target uplink signal using the target transmission mode.
[0119] Therefore, the terminal device according to embodiments of the present application
determines the target power control parameter corresponding to the target transmission
mode according to the received uplink power control information transmitted by the
network device. Therefore, when the terminal device uses different transmission modes
for uplink signal transmission, an independent uplink power control process can be
used to determine the uplink transmitting power corresponding to the transmission
mode. The uplink transmitting power can be flexibly adjusted to meet the requirements
of different transmission modes, and the terminal device is suitable for a communication
system supporting multiple transmission modes.
[0120] The terminal device 100 according to embodiments of the present application may refer
to the terminal device 10 in embodiments of the present application, and the respective
units/modules in the terminal device and other operations and/or functions described
above are respectively to implement the corresponding processes in the method 100.
For the sake of brevity, they will not be repeated here.
[0121] FIG. 8 shows a schematic block diagram of a network device according to another embodiment
of the present application. As shown in FIG. 8, a network device 200 includes a processor
210 and a transceiver 220. The processor 210 is connected to the transceiver 220.
The terminal device 200 further includes a memory 230, and the memory 230 is connected
to the processor 210. The processor 210, the memory 230, and the transceiver 220 can
communicate with each other through an internal connection path. The processor 210
is configured to determine uplink power control information, where the uplink power
control information is used for the terminal device to determine a target power control
parameter corresponding to a target transmission mode and to determine, according
to the target power control parameter, target transmitting power for transmitting
a target uplink signal using the target transmission mode, where the target transmission
mode is a target uplink multiple access mode, or the target transmission mode is a
target uplink beam, or the target transmission mode is a target uplink precoding mode,
or the target transmission mode is a target transmission scheduling mode; the transceiver
220 is configured to transmit the uplink power control information to the terminal
device.
[0122] Therefore, the network device according to embodiments of the present application
transmits the uplink power control information to the terminal device, so that the
terminal device can determine the target power control parameter corresponding to
the target transmission mode according to the received uplink power control information.
Therefore, when the terminal device uses different transmission for uplink signal
transmission, an independent uplink power control process can be used to determine
the uplink transmitting power corresponding to the transmission mode. The uplink transmitting
power can be flexibly adjusted to meet the requirements of different transmission
modes, and the network device is suitable for a communication system supporting multiple
transmission modes.
[0123] The network device 200 according to embodiments of the present application may refer
to the network device 20 in embodiments of the present application, and the respective
units/modules in the network device and the foregoing other operations and/or functions
are respectively to implement the corresponding processes in the method 200. For the
sake of brevity, they will not be repeated here.
[0124] It can be understood that the processor in embodiments of the present application
may be an integrated circuit chip with signal processing capability. The processor
may be a general-purpose processor, a Digital Signal Processor (DSP), an Application
Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other
programmable logic devices, discrete gates or transistor logic devices, and discrete
hardware components, which can implement or execute the methods, steps, and logical
block diagrams disclosed in the embodiments of the present application. The general-purpose
processor may be a microprocessor or the processor may be any conventional processor
or the like.
[0125] The memory in embodiments of the present application may be a volatile memory or
a non-volatile memory, or may include both volatile and non-volatile memories. The
non-volatile memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an
Erasable PROM (EPROM), or an Electrically EPROM (EEPROM) or flash memory. The volatile
memory may be a Random Access Memory (RAM) that acts as an external cache. By way
of example but not limitation, many forms of RAM are available, such as Static RAM
(SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR
SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM)), and Direct Rambus RAM (DR
RAM). It should be noted that the memories of the systems and methods described herein
are intended to include, without being limited to, these and any other suitable types
of memories.
[0126] Persons of ordinary skill in the art will appreciate that elements and steps of various
examples described with reference to the embodiments disclosed herein can be implemented
in electronic hardware or a combination of computer software and electronic hardware.
Whether these functions are performed in hardware or software depends on the specific
application and design constraints of the solution. A person skilled in the art can
use a different method for implementing the described functions for each particular
application, but such implementation should not be considered to go beyond the scope
of the present application.
[0127] A person skilled in the art can clearly understand that for the convenience and brevity
of the description, the specific working process of the systems, the devices and the
units described above can refer to the corresponding process in the above method embodiments,
and details are not described herein.
[0128] In the several embodiments provided by the present application, it should be understood
that the disclosed systems, devices, and methods may be implemented in other manners.
For example, embodiments of the device described above are merely illustrative. For
example, the division of the unit is only a division in logical functions. In actual
implementation, there may be another division manner, for example, multiple units
or components may be combined or may be integrated into another system, or some features
may be ignored or not executed. In addition, the coupling or direct coupling or communication
connection shown or discussed herein may be an indirect coupling or communication
connection through some interfaces, devices or units, and may be electrical, mechanical
or otherwise.
[0129] The units described as separate components may or may not be physically separated,
and the components displayed as units may or may not be physical units, that is, may
be located in one place, or may be distributed to multiple network units. Some or
all of the units may be selected according to actual needs to achieve the purpose
of the solutions of the embodiments.
[0130] In addition, the functional units in embodiments of the present application may be
integrated into one processing unit, or the units may exist physically separately,
or two or more units may be integrated into one unit.
[0131] The functions may be stored in a computer readable storage medium if implemented
in the form of a software functional unit and sold or used as a standalone product.
Based on such understanding, the technical solution of the present application essentially,
or the part making contributions relative to the prior art, or certain part of the
technical solution, may be embodied in the form of a software product stored in a
storage medium, including some instructions used to cause a computer device (which
may be a personal computer, a server, or a network device, etc.) to perform all or
part of the steps of the methods described in various embodiments of the present application.
The foregoing storage medium includes various mediums that can store program codes,
such as a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory
(RAM), a magnetic disk, an optical disk, or the like.
[0132] The above description are only specific implementations of the present application,
the protection scope of the present application is not limited thereto, and any person
skilled in the art can easily think of changes or substitutions within the technical
scope disclosed in the present application, which should be covered by the scope of
the present application. Therefore, the scope of the present application should be
defined by the scope of the claims.
1. A method for controlling uplink power, comprising:
receiving, by a terminal device, uplink power control information transmitted by a
network device;
determining, by the terminal device, according to the uplink power control information,
a target power control parameter corresponding to a target transmission mode, wherein
the target transmission mode is a target uplink multiple access mode, or the target
transmission mode is a target uplink beam, or the target transmission mode is a target
uplink precoding mode, or the target transmission mode is a target transmission scheduling
mode; and
determining, by the terminal device, according to the target power control parameter,
target transmitting power for transmitting a target uplink signal using the target
transmission mode.
2. The method according to claim 1, wherein the target transmission mode is one of multiple
transmission modes.
3. The method according to claim 1 or 2, wherein the target transmission mode is one
of multiple candidate transmission modes for the terminal device to transmit the target
uplink signal; or the target transmission mode is a transmission mode required for
the terminal device to transmit the target uplink signal.
4. The method according to any one of claims 1 to 3, wherein the uplink power control
information comprises open-loop power control information, and the open-loop power
control information comprises open-loop power control parameters corresponding to
multiple transmission modes comprising the target transmission mode;
the determining, by the terminal device, according to the uplink power control information,
a target power control parameter corresponding to a target transmission mode comprises:
determining, by the terminal device, according to the open-loop power control information,
a target open-loop power control parameter corresponding to the target transmission
mode from the open-loop power control parameters.
5. The method according to claim 4, wherein the receiving, by a terminal device, uplink
power control information transmitted by a network device comprises:
receiving, by the terminal device, the open-loop power control information which is
transmitted by the network device through a Radio Resource Control (RRC) message.
6. The method according to claim 4 or 5, wherein the target open-loop power control parameter
comprises at least one of following parameters: uplink objective receiving power,
a path loss factor, and a Sounding Reference Signal (SRS) power adjustment value.
7. The method according to any one of claims 1 to 6, wherein the uplink power control
information comprises power adjustment indication information;
the determining, by the terminal device, according to the uplink power control information,
a target power control parameter corresponding to a target transmission mode comprises:
determining, by the terminal device, according to the power adjustment indication
information and a preset correspondence, a target closed-loop power adjustment value
corresponding to the target transmission mode, wherein the preset correspondence is
a correspondence between the power adjustment indication information and a closed-loop
power adjustment value.
8. The method according to claim 7, wherein the determining, by the terminal device,
according to the power adjustment indication information and a preset correspondence,
a target closed-loop power adjustment value corresponding to the target transmission
mode comprises:
determining, by the terminal device, a target correspondence from the preset correspondence
according to the target transmission mode; and
determining, by the terminal device, the target closed-loop power adjustment value
according to the power adjustment indication information and the target correspondence.
9. The method according to claim 7 or 8, wherein the receiving, by a terminal device,
uplink power control information transmitted by a network device comprises:
receiving, by the terminal device, Downlink Control Information (DCI) transmitted
by the network device, wherein the DCI comprises the power adjustment indication information.
10. The method according to any one of claims 7 to 9, wherein the target closed-loop power
adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, the first transmitting power is transmitting power used
by the terminal device for transmitting an uplink signal of a same type as the target
uplink signal for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal which is determined by the terminal
device according to an open-loop power control parameter corresponding to the target
transmission mode.
11. The method according to any one of claims 1 to 10, further comprising:
transmitting, by the terminal device, the target uplink signal to the network device
using the target transmission mode and the target transmitting power.
12. The method according to any one of claims 1 to 11, wherein the target uplink signal
is one of following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
13. The method according to any one of claims 1 to 12, wherein the target uplink multiple
access mode is one of following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
14. A method for controlling uplink power, comprising:
determining, by a network device, uplink power control information, wherein the uplink
power control information is used for the terminal device to determine a target power
control parameter corresponding to a target transmission mode, and to determine, according
to the target power control parameter, target transmitting power for transmitting
a target uplink signal using the target transmission mode, wherein the target transmission
mode is a target uplink multiple access mode, or the target transmission mode is a
target uplink beam, or the target transmission mode is a target uplink precoding mode,
or the target transmission mode is a target transmission scheduling mode; and
transmitting, by the network device, the uplink power control information to the terminal
device.
15. The method according to claim 14, wherein the target transmission mode is one of multiple
transmission modes.
16. The method according to claim 14 or 15, wherein the target transmission mode is one
of multiple candidate transmission modes for the terminal device to transmit the target
uplink signal; or the target transmission mode is a transmission mode required for
the terminal device to transmit the target uplink signal.
17. The method according to any one of claims 14 to 16, wherein the uplink power control
information comprises open-loop power control information, the open-loop power control
information comprises open-loop power control parameters corresponding to multiple
transmission modes comprising the target transmission mode, and the open-loop power
control information is used for the terminal device to determine a target open-loop
power control parameter corresponding to the target transmission mode from the open-loop
power control parameters.
18. The method according to claim 17, wherein the transmitting, by the network device,
the uplink power control information to the terminal device comprises:
transmitting, by the network device, the open-loop power control information to the
terminal device through a Radio Resource Control (RRC) message.
19. The method according to claim 17 or 18, wherein the target open-loop power control
parameter comprises at least one of following parameters: uplink objective receiving
power, a path loss factor, and a Sounding Reference Signal (SRS) adjustment value.
20. The method according to any one of claims 14 to 19, wherein the uplink power control
information comprises power adjustment indication information, and the power adjustment
indication information is used for the terminal device to determine, according to
the power control indication information and a preset correspondence, a target closed-loop
power adjustment value corresponding to the target transmission mode, the preset correspondence
being a correspondence between the power adjustment indication information and a closed-loop
power adjustment value.
21. The method according to claim 20, wherein the transmitting, by the network device,
the uplink power control information to the terminal device comprises:
transmitting, by the network device, Downlink Control Information (DCI) to the terminal
device, wherein the DCI comprises the power adjustment indication information.
22. The method according to claim 20 or 21, wherein the target closed-loop power adjustment
value is an adjustment value of the target transmitting power relative to first transmitting
power, the first transmitting power is transmitting power used by the terminal device
for transmitting an uplink signal of a same type as the target uplink signal for a
previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal which is determined by the terminal
device according to an open-loop power control parameter corresponding to the target
transmission mode.
23. The method according to any one of claims 14 to 22, further comprising:
receiving, by the network device, the target uplink signal transmitted by the terminal
device using the target transmission mode and the target transmitting power.
24. The method according to any one of claims 14 to 23, wherein the target uplink signal
is one of following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
25. The method according to any one of claims 14 to 24, wherein the target uplink multiple
access mode is one of following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
26. A terminal device, comprising:
a transceiver module, configured to receive uplink power control information transmitted
by a network device;
a processing module, configured to determine, according to the uplink power control
information, a target power control parameter corresponding to a target transmission
mode, wherein the target transmission mode is a target uplink multiple access mode,
or the target transmission mode is a target uplink beam, or the target transmission
mode is a target uplink precoding mode, or the target transmission mode is a target
transmission scheduling mode;
the processing module is further configured to determine, according to the target
power control parameter, target transmitting power for transmitting a target uplink
signal using the target transmission mode.
27. The terminal device according to claim 26, wherein the target transmission mode is
one of multiple transmission modes.
28. The terminal device according to claim 26 or 27, wherein the target transmission mode
is one of multiple candidate transmission modes for the terminal device to transmit
the target uplink signal; or the target transmission mode is a transmission mode required
for the terminal device to transmit the target uplink signal.
29. The terminal device according to any one of claims 26 to 28, wherein the uplink power
control information comprises open-loop power control information, and the open-loop
power control information comprises open-loop power control parameters corresponding
to multiple transmission modes comprising the target transmission mode;
wherein the processing module is specifically configured to: determine, according
to the open-loop power control information, a target open-loop power control parameter
corresponding to the target transmission mode from the open-loop power control parameters.
30. The terminal device according to claim 29, wherein the transceiver module is specifically
configured to: receive the open-loop power control information which is transmitted
by the network device through a Radio Resource Control (RRC) message.
31. The terminal device according to claim 29 or 30, wherein the target open-loop power
control parameter comprises at least one of following parameters: uplink objective
receiving power, a path loss factor, and a Sounding Reference Signal (SRS) power adjustment
value.
32. The terminal device according to any one of claims 26 to 31, wherein the uplink power
control information comprises power adjustment indication information;
wherein the processing module is specifically configured to: determine, according
to the power adjustment indication information and a preset correspondence, a target
closed-loop power adjustment value corresponding to the target transmission mode,
wherein the preset correspondence is a correspondence between the power adjustment
indication information and a closed-loop power adjustment value.
33. The terminal device according to claim 32, wherein the processing module is specifically
configured to: determine a target correspondence from the preset correspondence according
to the target transmission mode; and
determine the target closed-loop power adjustment value according to the power adjustment
indication information and the target correspondence.
34. The terminal device according to claim 32 or 33, wherein the transceiver module is
specifically configured to: receive Downlink Control Information (DCI) transmitted
by the network device, wherein the DCI comprises the power adjustment indication information.
35. The terminal device according to any one of claims 32 to 34, wherein the target closed-loop
power adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, the first transmitting power is transmitting power used
by the terminal device for transmitting an uplink signal of a same type as the target
uplink signal for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal which is determined by the terminal
device according to an open-loop power control parameter corresponding to the target
transmission mode.
36. The terminal device according to any one of claims 26 to 35, wherein the transceiver
module is further configured to: transmit the target uplink signal to the network
device using the target transmission mode and the target transmitting power.
37. The terminal device according to any one of claims 26 to 36, wherein the target uplink
signal is one of following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
38. The terminal device according to any one of claims 26 to 37, wherein the target uplink
multiple access mode is one of following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).
39. A network device, comprising:
a processing module, configured to determine uplink power control information, wherein
the uplink power control information is used for the terminal device to determine
a target power control parameter corresponding to a target transmission mode and to
determine, according to the target power control parameter, target transmitting power
for transmitting a target uplink signal using the target transmission mode, wherein
the target transmission mode is a target uplink multiple access mode, or the target
transmission mode is a target uplink beam, or the target transmission mode is a target
uplink precoding mode, or the target transmission mode is a target transmission scheduling
mode; and
a transceiver module, configured to transmit the uplink power control information
to the terminal device.
40. The network device according to claim 39, wherein the target transmission mode is
one of multiple transmission modes.
41. The network device according to claim 39 or 40, wherein the target transmission mode
is one of multiple candidate transmission modes for the terminal device to transmit
the target uplink signal; or the target transmission mode is a transmission mode required
for the terminal device to transmit the target uplink signal.
42. The network device according to any one of claims 39 to 41, wherein the uplink power
control information comprises open-loop power control information, the open-loop power
control information comprises open-loop power control parameters corresponding to
multiple transmission modes comprising the target transmission mode, and the open-loop
power control information is used for the terminal device to determine a target open-loop
power control parameter corresponding to the target transmission mode from the open-loop
power control parameters.
43. The network device according to claim 42, wherein the transceiver module is specifically
configured to: transmit the open-loop power control information to the terminal device
through a Radio Resource Control (RRC) message.
44. The network device according to claim 42 or 43, wherein the target open-loop power
control parameter comprises at least one of following parameters: uplink objective
receiving power, a path loss factor, and a Sounding Reference Signal (SRS) adjustment
value.
45. The network device according to any one of claims 39 to 44, wherein the uplink power
control information comprises power adjustment indication information, and the power
adjustment indication information is used for the terminal device to determine, according
to the power control indication information and a preset correspondence, a target
closed-loop power adjustment value corresponding to the target transmission mode,
the preset correspondence being a correspondence between the power adjustment indication
information and a closed-loop power adjustment value.
46. The network device according to claim 45, wherein the transceiver module is specifically
configured to: transmit Downlink Control Information (DCI) to the terminal device,
wherein the DCI comprises the power adjustment indication information.
47. The network device according to claim 45 or 46, wherein the target closed-loop power
adjustment value is an adjustment value of the target transmitting power relative
to first transmitting power, the first transmitting power is transmitting power used
by the terminal device for transmitting an uplink signal of a same type as the target
uplink signal for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to second transmitting power, the second transmitting
power is transmitting power used by the terminal device for transmitting an uplink
signal of a same type as the target uplink signal using the target transmission mode
for a previous time; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to third transmitting power, the third transmitting power
is transmitting power - most recently determined by the terminal device - of an uplink
signal of a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fourth transmitting power, the fourth transmitting
power is transmitting power - most recently determined by the terminal device - of
an uplink signal which is transmitted using the target transmission mode and is of
a same type as the target uplink signal; or,
the target closed-loop power adjustment value is an adjustment value of the target
transmitting power relative to fifth transmitting power, the fifth transmitting power
is transmitting power of the target uplink signal which is determined by the terminal
device according to an open-loop power control parameter corresponding to the target
transmission mode.
48. The network device according to any one of claims 39 to 47, wherein the transceiver
module is further configured to: receive the target uplink signal transmitted by the
terminal device using the target transmission mode and the target transmitting power.
49. The network device according to any one of claims 39 to 48, wherein the target uplink
signal is one of following signals: a Physical Uplink Shared Channel (PUSCH), a Physical
Uplink Control Channel (PUCCH), an SRS, and a De Modulation Reference Signal (DMRS).
50. The network device according to any one of claims 39 to 49, wherein the target uplink
multiple access mode is one of following multiple access modes: Discrete Fourier Transform
Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix - Orthogonal
Frequency Division Multiplexing (CP-OFDM), Single-Carrier Frequency-Division Multiple
Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).